Question

Afla valoarea lui a. 136800-a-20000=89723

Answer 1

136 800-a-20 000=89 723
136 800-a=89 723+20 000
136 800-a=109 723
a=136 800-109 723
a=27 077

Answer 2

$136800-a-20000=89723 \\ \\ 136800-a=20000+89723 \\ \\ 136800-a=109723 \\ \\ a=136800-109723 \\ \\ a=27077$